Update fixed file also

Author: cgm616

tests/ui/xor_used_as_pow.fixed

@@ -26,7 +26,7 @@ fn main() {
     let _ = 10 ^ 0;
     {
         let x = 15;
-        let _ = 1_u32 << 15;
+        let _ = 1 << x;
         let _ = 10 ^ x;
     }
 }